JP3095671B2 - Sealed contact device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed contact device suitable for a relay for power load, an electromagnetic switch, and the like.

[0002]

2. Description of the Related Art As a first conventional example of this type of sealed contact device, there is one having a structure shown in FIGS. This material includes a sealed container B that gas mainly composed of formed hydrogen or hydrogen airtight space together with the bellows A for accommodating the contacts are sealed, integrally provided fixed contact C ₂ to one end C ₁ The other end C ₃ formed is a terminal C ₄ , and the fixed contact C is fixed by an adhesive member, and the movable contact is separated from and fixed to the fixed contact C _2.
A movable contact D provided with D ₁ and a movable contact D in a contact contact direction.
Contact spring E for biasing the contact and movable contact D in the contact separation direction
A return spring E for urging a movable shaft F having one end F ₁ is continuously to protrude the movable contactor D from the sealed container, and a sealing contact portion G having a one end F ₁ of the movable shaft F A housing provided with a driving member H that is driven to open and close the contacts C ₂ and D ₁ , and a bonding portion J ₁ that accommodates the sealing contact portion G and the driving member H and flows the bonding member.
J and

[0003] Specifically, the fixed contact C is 2 are Doorikyoku to have provided the fixed contact C ₂ to one end C ₁ formed in a substantially J-shape, one end portion C ₁ and integrally by screwing L-shaped other end portion C ₃ is in the terminal portion C ₄ formed. Then, the adhesive strip C ₅ provided in the terminal portion C _4, after being inserted into the bonding portion J ₁ of the shaped box which is provided in the housing J, are secured with an adhesive member is poured in the adhesive portion J _1.

[0004] In the sealed contact device of the first conventional example described above, from being one end C ₁ integrally formed by the other end C ₃ is screwed which has a terminal portion C _4, Fixed contact C ₂
Each member such as one end portion C ₁ provided with the terminal, the other end portion C ₃ of the terminal portion C ₄ , and a screw is required, so that there is a problem that the assembling time is required.

For this purpose, as in the second conventional example shown in FIG. 7, in order to reduce the number of members constituting the fixed contact C, one end C ₁ provided with the fixed contact C ₂ and the terminal C _4. the other end portion C ₃ to be integrated as the same member, the fixed contact C itself to be able to screwed by the cylinder,
After penetrating the through hole J ₂ provided in the housing J, between the fixed contact C and the inner peripheral portion of the through hole J ₂ as an adhesive portion J _1,
There is _{one in} which an adhesive member is poured into and fixed to the adhesive portion J1.

[0006]

[SUMMARY OF THE INVENTION However, according the second in the conventional example sealed contact device, between the integrated fixed contact C and the inner peripheral portion of the through hole J ₂ are bonded portion J _{Because of 1} , there was a risk that the adhesive member would seep out from a small gap.

The present invention has been made in view of the above circumstances, and has as its object to provide a sealed contact device in which the number of members is reduced and an adhesive member does not exude. is there.

[0008]

In order to solve the above-mentioned problems, a sealed contact device of the present invention forms an airtight space with a bellows for accommodating contacts, and is filled with hydrogen or a gas mainly composed of hydrogen. A fixed contact at one end, a fixed contact at one end, a fixed contact at the other end, which is fixed to the terminal with an adhesive member, and a movable contact at the fixed contact. A movable contact, a contact pressure spring for biasing the movable contact in the contact contact direction, a return spring for biasing the movable contact in the contact separation direction, and one end protruding from the sealed container and connected to the movable contact. A sealed contact portion having a movable shaft provided, a driving member for driving one end of the movable shaft to open and close the contact, and an adhesive portion for accommodating the sealing contact portion and the driving member and flowing the adhesive member. Provided in the sealed contact device, The sealing contact portion in ridge or ridges thereof orbiting provided in the housing to the outer circumference of at least one of the abutment portion abutting when accommodated in the housing are a configuration having elasticity.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The sealed contact device includes a sealed contact portion AA, a driving member BB, and a housing CC.

First, the sealing contact portion AA will be described. Reference numeral 1 denotes a sealed container, a container body 2 formed in a box shape with one side opened by a heat-resistant material such as ceramic, and a bellows formed in a bellows shape by forming a corrugated pleat on a thin metal cylinder.
A lid 4 made of a 42 alloy or the like and having a through hole 4a in the center and a ventilation hole 4b at an appropriate position, and a bellows retainer 6 provided with a bearing 5, etc.
A gas mainly composed of hydrogen is sealed in the inside thereof through the vent hole 4b at, for example, about 2 atm, and then the vent hole 4b is sealed. A flat insulating plate 7 made of a heat-resistant material such as ceramic is fitted inside the lid 4 so that the lid 4
4 is protected from arcing.

Reference numeral 8 denotes a fixed contact, which is made of a copper-based material, has a substantially cylindrical shape, and is locally thickened with one end 8b to which the fixed contact 8a is fixed being located inside the sealed container 1. The central portion 8c is fixed to the sealed container 1 by brazing or the like via a fixing member 9 made of 42 alloy or the like. In addition, fixed contact
8a may be provided integrally with the fixed contact 8 using the same material. In addition, the fixed contact 8 is
The other end 8e that becomes the terminal 8d through which the washer 11 and 10 are inserted
Is projected from the sealing container 1, and the vicinity of the central portion 8c is bonded to the housing CC and the sealing container 1, as will be described in detail later.

Reference numeral 12 denotes a movable contact, which is formed in a substantially flat plate shape by fixing a movable contact 12a to both ends of the movable contact with a copper-based plate material at an interval capable of coming in contact with and separating from the fixed contact 8a. The movable contact 12
a may be provided integrally with the movable contact 12 using the same material.

Reference numeral 13 denotes a movable shaft, which is formed in a round bar shape, and has one end 13a protruding from the sealed container 1 when it is disposed.
This movable shaft 13 is supported at one end near the bearing 5,
Near the other end 13b is supported by a bearing 14.

Reference numeral 15 denotes a contact pressure spring, which is formed in a coil shape with an inner diameter slightly larger than the outer diameter of a contact pressure spring frame 16 described later.

Reference numeral 16 denotes a contact pressure spring frame which is formed in a cylindrical shape with a bottom having a flange 16a at an open end and an insertion hole at the bottom, and the contact pressure spring frame 16 also serves to protect the bellows 3.

Reference numeral 17 denotes a movable contact holder, which is formed in a bifurcated shape with a center piece having an insertion hole and two leg pieces on both sides.

The movable shaft 13 is connected to a contact spring frame.
The lowermost portion is inserted and fixed in an insertion hole provided in the bottom of the movable contact holder 17 and the bottom of the movable contact holder 17. At this time, the contact pressure spring
Reference numeral 15 denotes a suspension suspended between the movable contact 12 and the flange 16a of the contact pressure spring frame 16, that is, the movable contact 12a is biased in the direction in which the movable contact 12a contacts the fixed contact 8a.

Reference numeral 18 denotes a return spring, which is formed in a coil shape and is movable in a direction in which the movable contact 12a is separated from the fixed contact 8a.
It is arranged to energize 12. 19 is a return spring frame,
It is formed of a heat-resistant insulating material such as ceramic and has a cylindrical shape with a bottom, is fitted around the return spring 18 so as to surround it, and is disposed near the contact.

The magnetic means (not shown) comprises a permanent magnet and a yoke sandwiching the permanent magnet. The yoke is attached to the outer surface of the container body 2 so as to sandwich the fixed contact 8a and the movable contact 12a. Therefore, the magnetic means applies a magnetic field in a direction perpendicular to the operation direction of the movable contact 12a to the space where the contacts 8a, 12a exist.

Next, the driving member BB will be described. This is an electromagnet device. Reference numeral 20 denotes a coil, which is wound around a coil frame 21. A movable shaft 22 has one end 22a screwed to a movable core (not shown) that can move an insertion hole of the coil frame 21 in the axial direction when the coil 20 is excited. Reference numeral 23 denotes a yoke, and a central piece and both opposing pieces U surround the ends of the coil 20.
It is formed in a character shape. The movable shaft 22 is in contact with one end 13a of the movable shaft 13 when screwed into the movable iron core. Reference numeral 24 denotes a yoke plate, which is fixed to the yoke 23.
Reference numeral 25 denotes a fixed iron core having one end fixed to the center of the yoke 23 and an insertion hole 25a through which the movable shaft 22 is inserted. 26 is a support spring which supports each of the above-mentioned members.

Next, the housing CC will be described. This accommodates both the sealing contact portion AA and the driving member BB. Reference numeral 27 denotes a case, which is formed in a substantially box shape having an opening 27a on one side, and a gourd-shaped through hole 27d having a cutout portion 27c formed by cutting an inner edge locally into the bottom plate portion 27b. Have been. A slightly extending ridge 27e is provided slightly outside the opening edge of the through hole 27d on the opening 27a side. Numeral 28 denotes a capsule cushion, which is made of an elastic material and is disposed between the case 27 and the sealing container 1 in order to absorb a dimensional tolerance of the sealing container 1.
And a contact portion 29 that comes into contact therewith. The capsule cushion 28 is provided with a gourd-shaped overlap hole 28e that overlaps with the through hole 27d of the case 27. Reference numeral 30 denotes a body which is formed in a substantially rectangular cylindrical shape, and has a screw hole 30a formed at one end opening side. The inside of the body 30 is divided at the center by a central partition 30b, and at the center of the central partition 30b,
An insertion hole 30c through which the movable shaft 13 is inserted is formed. A bottom plate 31 has a screw hole 31a which is screwed into a screw hole 30a of the body 30 with a screw 32.

Next, a procedure for bonding the fixed contact 8 to the housing CC will be described. The sealing container 1 is disposed in the case 27 of the housing CC, and the fixed contact 8 protruding from the sealing container 1 is communicated with the through hole 27d of the case 27 and the overlapping hole 28e of the capsule cushion 28, as described above. After being fixed to the sealing container 1 by brazing or the like via the fixing member 9, the through holes 27 are formed.
An adhesive member is poured from the cut portion 27c of d and bonded. That is, the bonding portion 33 is formed between the inner peripheral portion of the through hole 27d of the case 27 and the outer peripheral portion of the central portion 8c of the fixed contact 8.

Next, the operation of this embodiment will be described. coil
When the movable iron core is attracted to the fixed iron core 25 by the excitation of 20, the movable shaft 22 screwed to the movable iron core moves to drive one end 13a of the movable shaft 13 and the movable contact 12 of the movable contact 12
a contacts the fixed contact 8a.

When the excitation of the coil 20 is cut off, the movable contact 12 returns by the urging force of the contact pressure spring 15 and the return spring 18, so that the movable contact 12a is separated from the fixed contact 8a, and Until the movable iron core is also restricted by the support spring 26,
It returns by a predetermined distance and returns to the original state. The arc generated between the contacts at the time of return is sufficiently extended toward both ends of the movable contact 12 by the magnetic field of the magnetic means (not shown) and extinguished.

In such a sealed contact device, the fixed contact 8 has one end 8b provided with the fixed contact 8a and the other end 8e serving as the terminal 8d integrated with each other. The number of the bonding contacts 33 for bonding the fixed contact 8 is reduced so as to surround the bonding portion 33 when the sealing contact portion AA is housed in the housing CC. Ridge 27
e is in contact with the contact portion 29 and the elastic contact portion 29 is bent, so that the adhesiveness between the ridge 27e and the contact portion 29 is improved. No more seeping out.

In this embodiment, a capsule cushion 28 made of an elastic material is provided, and the capsule cushion 28 serves as a contact portion 29 that comes into contact with the ridge 27e. So that it can be made thin and bend,
The rubber ridge 27e may be adhered to the ridge 27e so that the ridge 27e itself has elasticity. In this case, the capsule cushion 28 need not be provided as the contact portion 29.

[0027]

According to the sealed contact device of the present invention, the fixed contact has a reduced number of members since one end provided with the fixed contact and the other end serving as the terminal are integrated. Further, when the sealing contact portion is housed in the housing, a ridge provided around the bonding portion abuts on the contact portion. Since the elastic ridge or the abutting portion bends, the adhesion between the ridge and the abutting portion is improved, so that the adhesive member does not seep out from the ridge.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the vicinity of a sealed contact portion according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a plan view of a housing case according to the first embodiment;

FIG. 4 is a partial cross-sectional view of a housing case according to the first embodiment;

FIG. 5 is a sectional view of a first conventional example.

FIG. 6 is a perspective view of the vicinity of an adhesive part according to the third embodiment.

FIG. 7 is a cross-sectional view of the vicinity of a sealed contact portion of a second conventional example.

[Explanation of symbols]

 AA Sealed contact part 1 Sealed container 3 Bellows 8 Fixed contact 8a Fixed contact 8b One end 8d Terminal 8e Other end 12 Movable contact 12a Movable contact 13 Movable shaft 13a One end 14 Contact pressure spring 18 Return spring BB Drive member CC housing 27e Protrusion 29 Contact part 33 Adhesion part

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hideki Kurusumi 1048 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) References Japanese Utility Model 6-58685 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01H 1/66 H01H 50/54 H01H 9/02 H01H 9/04

Claims (1)

(57) [Claims] 1. A sealed container in which an airtight space is formed together with a bellows for accommodating a contact and in which hydrogen or a gas mainly composed of hydrogen is sealed, and a fixed contact is provided at one end, and the other end is integrally formed. A fixed contact that is fixed by an adhesive member, and a movable contact provided with a movable contact that comes into contact with and separates from the fixed contact; a contact pressure spring that biases the movable contact in the contact contact direction; Driving a sealed contact portion having a return spring for urging the movable contact in the contact separating direction, a movable shaft having one end protruding from the sealed container and connected to the movable contact, and one end of the movable shaft A sealed contact device comprising: a driving member that opens and closes a contact; and a housing that houses the sealed contact portion and the driving member and that has an adhesive portion into which the adhesive member is poured. A circumferential ridge provided on the housing or Sealed contact device in which at least one of the abutting portion that abuts when the sealed contact portion is received in the housing, characterized in that elastic.